function openwin (url,w,h,x,y,name) {
    a = arguments;
    url = a[0] ? a[0] : "about:blank";
    w = a[1] ? a[1] : 300;
    h = a[2] ? a[2] : 200;
    x = a[3] ? a[3] : screen.width/2 - w/2;
    y = a[4] ? a[4] : screen.height/2 - h/2;
    popwin = window.open (url,name,"width="+w+",height="+h+",toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,fullscreen=no");
    if (popwin) {
    	popwin.resizeTo (w,h);
    	popwin.moveTo (x,y);
    	popwin.focus();
    }
    setTimeout ("popwin.focus()",500);
}